The 1961 Buick Special Skylark came standard with a 215 cubic-inch, all-aluminum block, V-8 engine that used a higher compression ratio and a 4-barrel carburetor to produce 185 horsepower (138 kW). For the 1962 model year, the Buick Skylark became a model in its own right, instead of being a subseries of the Special. The 1963 Buick Skylarks used the same chassis and wheelbase as the previous 1961 and 1962 models, but adopted new sheet metal that featured boxier styling.
In addition to the two-door convertible and hardtop coupe body-styles, a Skylark four-door sedan became available for the first time. Skylarks, however, would continue to have higher levels of exterior and interior trim compared to the Special and Special Deluxe from which they were derived. All-vinyl bucket seats would be standard on the convertible and optional on the hardtop coupe. The sedan would come with cloth-and-vinyl seats standard, and an all-vinyl interior would be optional.
Beginning with the 1965 model year, a two-door sedan (pillared coupe) was added to the Skylark lineup. Inspired in no small part by the sales success of the 1964 Pontiac Tempest LeMans GTO, the Gran Sport option became available in mid 1965 for the three two-door Skylark models.
In the 1966 model year, the four-door (pillared) sedan was replaced by a four-door (pillarless) hardtop sedan. The convertible, hardtop coupe, and two-door sedan continued to be available. The four-door sedan would rejoin the lineup for the 1967 model year, making a total of five Skylark body styles.
The 1968 model year was one of significant change for the Buick Skylark. Although still using the same basic chassis, all of GMs mid-sized cars adopted a policy of using two different length wheelbases. Two-door models used a shorter wheelbase of 112-in, while four-door models used a longer wheelbase of 116-in. All of GMs mid-sized cars received all-new sheet metal. The Gran Sport, previously an option package available on the Skylark, became a separate series.